High Quality: Made of high quality engineering plastics,Durable, strong, water resistant Easy to Install: Securely connected, not easy to fall off. Make you put the connected part into the 70~80°water for assmbling. After it cools down the tube will stay tight. Usage: Used with drip irrigation to connect drip -type tubing.Great for watering potted plants. Product may cause some plastic smell in the long time 's package. Pls open and hand where the air convection in 1-2 . The plastic smell it will go normally. Size: The inner diameter is about 4mm colour:black material:plastic size:The size is changed to an inner diameter of about 4mm, suitable for 4/7 positive tee joint Package Contents: 200 x joint accessories Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.